<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 300px;
            height: 300px;
            background-color: aquamarine;
        }
        span{
            background-color: blueviolet;
        }
        div:hover span{
            /* 隐藏span */
            /* display: none; */
            visibility: hidden;
        }
    </style>
</head>
<body>
    <div>
        <span>
            我是存在的
        </span>
        哈哈哈哈哈
    </div>
</body>
</html>